var info={
    son:{
        name:"李四",
        sex:"male"
    },
    bother:[{
        name:"李一",
        sex:"male"
    },{
        name:"李er",
        sex:"male"
    }]
}
document.writeln("姓名："+info.son.name+"，性别："+son.sex);
document.writeln("姓名："+info.son.bother.name+"，性别："+info.son.bother.sex)
);